Air Compressor Specifications
| Lubrication | Do not operate without lubricant or with inadequate lubricant. Ingersoll-Rand is not responsible for compressor failure caused by inadequate lubrication. |
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Troubleshooting
16Symptoms & remedies
| Symptom | Cause | Remedy |
|---|---|---|
| Excessive starting and stopping | Lubricant viscosity too low; Detergent type lubricant being used; Improper starter overload heaters; Automatic start and stop mode is not suitable for air demand | Drain existing lubricant and refill with proper lubricant; Drain existing lubricant and refill with proper lubricant; Check starter overload heaters; Run compressor for longer duty cycles |
| Knocks or rattles | Loose beltwheel or motor pulley, excessive end play in motor shaft or loose drive belts; Improper starter overload heaters; Drive belts too tight or misaligned; Compressor valves leaky, broken, carbonized or loose; Carbon build-up on top of piston(s); Piston rings damaged or worn (broken, rough or scratched). Excessive end gap or side clearance | Check beltwheel, motor pulley, crankshaft, drive belt tension and alignment. Repair or replace as required; Check starter overload heaters; Check drive belt tension and alignment; Check compressor valves and repair or replace as required; Remove carbon build-up; Replace piston rings |
| Lights flicker or dim when running | Improper line voltage; Wiring or electric service panel too small | Check line voltage; Check wiring and electric service panel size |
| Moisture in crankcase or “milky” appearance in petroleum lubricant or rusting in cylinders | Extremely light duty cycles; Compressor located in damp or humid location | Run compressor for longer duty cycles; Relocate compressor or install crankcase heater kit |
| Motor overload trips or draws excessive current | Lubricant viscosity too low; Lubricant viscosity too high; Improper line voltage; Wiring or electric service panel too small; Poor contact on motor terminals or starter connections; Improper starter overload heaters; Poor power regulation (unbalanced line); Drive belts too tight or misaligned; Compressor valves leaky, broken, carbonized or loose; Carbon build-up on top of piston(s); Piston rings damaged or worn (broken, rough or scratched). Excessive end gap or side clearance; Cylinder(s) or piston(s) scratched, worn or scored | Drain existing lubricant and refill with proper lubricant; Drain existing lubricant and refill with proper lubricant; Check line voltage; Check wiring and electric service panel size; Check motor terminals and starter connections; Check starter overload heaters; Check power regulation; Check drive belt tension and alignment; Check compressor valves and repair or replace as required; Remove carbon build-up; Replace piston rings; Repair or replace cylinder(s) or piston(s) |
| Oil in discharge air (oil pumping) | Lubricant level too high; Lubricant level too low; Detergent type lubricant being used; Compressor valves leaky, broken, carbonized or loose; Carbon build-up on top of piston(s); Piston rings not seated, are stuck in grooves or end gaps not staggered; Cylinder(s) or piston(s) scratched, worn or scored; Worn cylinder finish | Drain excess lubricant; Add lubricant to crankcase to proper level; Drain existing lubricant and refill with proper lubricant; Check compressor valves and repair or replace as required; Remove carbon build-up; Free or replace piston rings; Repair or replace cylinder(s) or piston(s); Repair or replace cylinder |
| Oil leaking from shaft seal | Crankshaft seal worn or crankshaft scored | Replace crankshaft seal or repair crankshaft |
| Safety/relief valve “pops” | Clogged or dirty inlet and/or discharge line filter; Lubricant viscosity too low; Defective safety/relief valve; High pressure inlet valve leaking | Clean or replace; Drain existing lubricant and refill with proper lubricant; Replace safety/relief valve; Repair or replace high pressure inlet valve |
| High interstage pressure | High pressure inlet valve leaking | Repair or replace high pressure inlet valve |
| Low interstage pressure | Low pressure discharge valve leaking | Repair or replace low pressure discharge valve |
| Engine cranks slowly or will not start | Lubricant viscosity too high; Poor contact on motor terminals or starter connections; Engine not grounded properly; Gasoline exceeds storage time or contains water | Drain existing lubricant and refill with proper lubricant; Check motor terminals and starter connections; Ground engine properly; Drain and replace gasoline |
| Motor will not start | Improper line voltage | Check line voltage |
| Engine will not start | No fuel in tank; Fuel valve closed | Add fuel to tank; Open fuel valve |
| Oil Leaks | Loose fittings/elbows/connectors | Tighten or replace fittings/elbows/connectors |
| Low Oil Pressure | Low oil pressure; Maladjusted or defective oil pressure regulator valve; Maladjusted or defective hydraulic unloader valve; Oil foaming in crankcase | Check and correct oil pressure; Adjust or replace oil pressure regulator valve; Adjust or replace hydraulic unloader valve; Correct oil foaming in crankcase |
| Excessive oil pressure fluctuations (> 5 psi) | Low oil pressure; Maladjusted or defective oil pressure regulator valve; Maladjusted or defective hydraulic unloader valve; Defective oil pressure gauge; Oil foaming in crankcase | Check and correct oil pressure; Adjust or replace oil pressure regulator valve; Adjust or replace hydraulic unloader valve; Replace oil pressure gauge; Correct oil foaming in crankcase |
Fault codes and symptom→remedy steps extracted from this unit’s service/owner documentation; verify against the official manual before servicing.
Available documents
Owner's manual
About
Ingersoll Rand 2479N5 — air compressor. Specifications and parts compiled from manufacturer documents.